I'm still trying to figure out how there can be liability for the airlines when their pilots did the standard procedure for a hijacking at the time: cooperate. I could possibly see some grounds for suing the airport for security lapses, but even that's a little shaky given that the only thing legally wrong with the hijackers (before the horrific murder/suicide attack) was that they had overstayed their visas, IIRC.

I agree.